JPH0444768B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a digital input/output device (D _i /D _p )
A test device that tests the operation of a program controller (hereinafter also simply referred to as a PC) by collecting digital input/output data of the program controller (hereinafter also simply referred to as a PC) that controls the program controller in a predetermined manner and displaying the temporal changes in time chart format. Regarding.

[Prior art and its problems]

In general, D _i /D _p controlled by a PC is:
Since some operate at fast speeds and others operate at slow speeds, it is desirable to match the data sampling period to each operating speed.
The PC allows sampling to be performed by selecting an arbitrary period depending on the object to be controlled. However, if this sampling period is set to be larger than the operating period of the PC, the data transition that leads to the establishment of the condition will be overlooked, making it impossible to perform the test.

[Purpose of the invention]

This invention was made to eliminate these drawbacks, and it makes it possible to know the operation of a program controller in terms of a time course that matches the input/output device that is normally controlled, and also allows data to change. It is an object of the present invention to provide a program controller testing device that can prevent data that leads to the establishment of a condition from being overlooked by making it possible to know the last minute from a temporal transition that matches the operating cycle of the program controller. It is something.

[Key points of the invention]

This invention captures and stores the digital input/output data of a programmable controller at its operating cycle, and also stores the data at a predetermined cycle that suits the controlled object, so that the transition of the input/output data can be normally adjusted to suit the controlled object. Periodically, also
The time immediately before a predetermined condition is satisfied can be displayed at each operating cycle of the program controller.

[Embodiments of the invention]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.
Figure A is a configuration diagram showing the configuration of the input/output number (NO) storage unit in Figure 1, Figure 1B is a configuration diagram showing the configuration of the display condition storage unit, and Figure 1C is also a configuration diagram showing the configuration of the data collection unit. Similarly, FIG. 1D is a configuration diagram showing the configuration of the detailed data storage section, and FIG. 2 is a time chart showing a display example. In Figure 1, 1 is the keyboard, 2 is the input/output NO storage unit, and 3 is the keyboard.
is a sampling period storage section, 4 is a condition storage section, 5
is a timer section, 6 is a data collection section, 7 is a digital input/output section (D _i /D _p ), 8 is a detailed data storage section, 9
10 is a data storage section, 10 is a condition comparison section, and 11 is a display section.

The keyboard 1 is used to set the number (NO) of the input/output device from which data should be collected, sampling period, display conditions, etc.
It is configured as shown in the figure, and stores the input/output device number specified on the keyboard 1. The sampling cycle storage unit 3 stores, for each input/output device number specified by the keyboard 1, the frequency at which the input/output data is collected, which is multiple times the operation cycle of the program controller, and displays the display condition storage unit 4. is 1st B
It is configured as shown in the figure, and the state (ON, OFF) of each input/output device stored in the input/output NO storage unit 2 is set as "1" for each input/output device to indicate when data collection will be stopped. , “0” is stored as ON/OFF data. The timer unit 5 outputs the operating cycle signal S ₁ of the program controller and the sampling cycle signal S ₂ which is multiplied by the value stored in the sampling cycle storage unit 3, and the data collecting unit 6 outputs this operating cycle signal S 2 . S ₁ or sampling period signal S ₂
is given, the input/output data of the number stored in the input/output NO storage section 2 is read from D _i /D _p 7 and stored as shown in FIG. 1C. At this time, the input/output data read together with the operating period signal S ₁ is stored in the detailed data storage section 8 as shown in FIG. 1D, while the input data read together with the sampling period signal S ₂ is stored in the detailed data storage section 8. The data is stored in a data storage section 9 having a similar structure. Note that the pointer P shown in Figure 1D indicates the current input/output data storage position, which is incremented by 1 each time input/output data is stored, but when it reaches the end of the storage position, it returns to the beginning again. It is structured as follows. The condition comparison unit 10 compares the data from the input/output unit 7 read together with the operation cycle signal S ₁ and the stop condition data stored in the display condition storage unit 4, and outputs a condition fulfillment signal S ₃ when they match. to stop data collection by the data collection unit 6, and display the display unit 11 to display the data storage unit 8 or 9.
Display the contents of. Note that the data displayed at this time is the content up to the position indicated by the pointer in the data storage unit 8 or 9, and specifically, the data displayed in the second
It is displayed in a time chart format as shown in the figure. Further, the content of the storage section 8 or 9 to be displayed can be selected by an operator's instruction.

Here, when trying to display the data transition at the point where the input/output data of the first input/output device changes from "0" to "1", such as time t shown in FIG. The input/output number "1" is registered in the input/output number storage section 2 shown in the figure, and the first number of the display condition storage section 4 shown in FIG.
“1” is stored in the portion corresponding to the input/output device. Note that at this time, the sampling period storage unit 3
Needless to say, the sampling period n suitable for the operating speed of the first input/output device is set.
After these settings are made, the data collection unit 6
When the input/output data is collected as shown in FIG. 1C, the detailed data of the first input/output device is stored in the storage unit ₈ as shown in FIG. 1D with the operation cycle signal S1, while the operation cycle signal S ₁ times n times the period (signal
S ₂ ), the data of the first input/output device is stored in the storage section 9.
is stored in Then, at time t, the condition data set in the display condition storage section 4 of the first input/output device, the condition data obtained via the data collection section 6, and the condition data obtained via the data collection section 6 are combined. When the condition comparison unit 10 detects that the data of the input/output device 1 match, the condition comparison unit 10 outputs a condition fulfillment signal _S3 to stop the data collection by the data collection unit 6, and also drives the display unit 11. , the contents of the storage section 9 or 8 are displayed. In this case, if only the data storage section 9 is used, depending on the setting of its sampling period, there is a risk of missing the data transition from "0" to "1" at time t of the first input/output device. This is prevented by the detailed data storage section 8. Of course, if the detailed data storage section 8 had an infinite capacity, it would be possible to deal with any situation, but that would make the capacity too large to be practical.
By configuring as in this embodiment, it can be said that memory capacity is saved.

The operation will be specifically explained below with reference to the third example. Note that FIG. 3 is an explanatory diagram of an example of operation of the embodiment of the present invention.

The first memory (detailed data storage section 8) in the embodiment cyclically stores data sampled at the operating cycle of the controller, and the second memory (detailed data storage section 9) stores data sampled at the operating cycle of the controller. Value multiplication (determined according to the controlled object)
Data sampled at is stored cyclically.

If the sampling period of the second memory is, for example, three times the sampling period of the first memory,
The sampling state of the n-th input number is as shown in FIG. 3a, and the storage contents of the first and second memories storing this are as shown in FIG. 3b, respectively.

Note that when the storage capacity of the first memory is set to 10 data, the data from _A10 is replaced by the data from _A1 and cyclic data. The second memory is similarly replaced by a cyclic one. Therefore, partially the same data will be stored. This first
12 The time chart based on the stored contents of the memory is as shown in Figure 3c.

As is clear from FIG. 3, by providing a second memory (data storage unit 9) that stores data sampled at an operation cycle determined according to the controlled object, the controlled object can be controlled using a limited memory capacity. It is possible to display a time chart over a long period of time that matches the input/output device.

However, since this time chart does not provide detailed information, a first memory (detailed data storage section 8) is provided to store data sampled at the operating cycle of the controller, and the stored contents of this first memory are also time sensitive. The detailed data that led to the fulfillment of the conditions can be seen on the chart.

The present invention provides a controller testing device that is capable of displaying both a long-term time chart suitable for an input/output device to be controlled and a time chart of detailed data leading to the establishment of conditions using a memory with a limited storage capacity. As stated earlier, the purpose is to provide information.

〔Effect of the invention〕

According to the present invention, the input/output data of the program controller is stored at the operating cycle of the program controller and at a cycle n times the operating cycle of the program controller.
By providing a storage unit for each type, it is possible to display data with a time transition that suits the controlled object, and the data immediately before the condition is satisfied can be displayed in detail, so there is no risk of overlooking data transitions. This has the advantage of eliminating

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.
Figure A is a configuration diagram showing the configuration of the input/output number storage unit in Figure 1, Figure 1B is a configuration diagram showing the configuration of the display condition storage unit, and Figure 1C is a configuration diagram showing the configuration of the data collection unit. FIG. 1D is a block diagram showing the structure of the detailed data storage section, FIG. 2 is a time chart showing an example of display, and FIG. 3 is a diagram illustrating an example of operation of an embodiment of the present invention. Description of symbols, 1...keyboard, 2...input/output number storage section, 3...sampling cycle storage section, 4...
...Display condition storage unit, 5...Timer unit, 6...Data collection unit, 7...Digital input/output device (D _i /
D _p ), 8... Detailed data storage section, 9... Data storage section, 10... Condition comparison section, 11... Display section.

Claims (1)

[Scope of Claims] 1. By collecting input/output data of a program controller that inputs/outputs data related to each controlled object in a predetermined operation cycle and displaying its temporal changes in a time chart format, the program controller can be operated. A test device for testing operation, comprising: a first memory for storing input/output data collected in the operation cycle of a program controller corresponding to each controlled object; a second memory that stores only data collected at a cycle that is a predetermined value times the operating cycle that is suitable for each controlled object, and the data that is stored in the first memory is set in advance; condition determination means for individually determining whether or not a condition is satisfied and stopping data collection when the condition is satisfied;
1. A program controller testing device comprising: display means for selectively switching and displaying data stored in a memory of the program controller.